That's the sport. If she has mental issues than maybe it's time to hang them up and let a new breed right to the occasion.
Sports is pressure. If you can't do it, fine, bow out. How can she be trusted going forward? There are alot of peoples lives who are impacted when you don't have the top talent in place. Just look at Canada economy for example...
Do it or don't. Criticism will follow, but it's not malicious for the most part. It's basically stating, "if you can't do it, you can't do it. Let's stop the narrative and fill her spot next time".
She has the right to leave if she can't handle it. Comparitivelty speaking though, this isn't pressure. Being a single mother who has been evicted is pressure. Being in a war and shot at from God knows where is pressure. Trying to make ends meet month to month is pressure.
Life is pressure. Without judging her, I'm sure her teammates and coaches wishes she would have dealt with this before the Olympics, not during...